This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 351 |
| 3 | 7826 |
| 4 | 210456 |
| 5 | 6047412 |
| 6 | 181410426 |
| 7 | 5597460306 |
| 8 | 176319684486 |
| 9 | 5642220380006 |
| 10 | 182807931073356 |
| 11 | 5982804736593846 |
| 12 | 197432556035646576 |
| 13 | 6560835699716880876 |
| 14 | 219319364810710999926 |
| 15 | 7369130657373455467336 |
| 16 | 248708159686089506901366 |